Co-reconstitution of subunits E and G of the yeast V-ATPase and the alpha and beta subunits of the F(1)-ATPase from the thermophilic Bacillus PS3 (TF(1)) resulted in an alpha(3)beta(3)EG hybrid complex showing 53% of the ATPase activity of TF(1). The alpha(3)beta(3)EG oligomer was characterized by electron microscopy. By processing 40,000 single particle projections, averaged two-dimensional projections at 1.2-2.4-nm resolution were obtained showing the hybrid complex in various positions. Difference mapping of top and side views of this complex with projections of the atomic model of the alpha(3)beta(3) subcomplex from TF(1) (Shirakihara, Y., Leslie, A. G., Abrahams, J. P., Walker, J. E., Ueda, T., Sekimoto, Y., Kambara, M., Saika, K., Kagawa, Y., and Yoshida, M. (1997) Structure 5, 825-836) demonstrates that a seventh mass is located inside the shaft of the alpha(3)beta(3) barrel and extends out from the hexamer. Furthermore, difference mapping of the alpha(3)beta(3)EG oligomer with projections of the A(3)B(3)E and A(3)B(3)EC subcomplexes of the V(1) from Caloramator fervidus (Chaban, Y., Ubbink-Kok, T., Keegstra, W., Lolkema, J. S., and Boekema, E. J. (2002) EMBO Rep. 3, 982-987) shows that the mass inside the shaft is made up of subunit E, whereby subunit G was assigned to belong at least in part to the density of the protruding stalk. The formation of an active alpha(3)beta(3)EG hybrid complex indicates that the coupling subunit gamma inside the alpha(3)beta(3) oligomer of F(1) can be effectively replaced by subunit E of the V-ATPase. Our results have also demonstrated that the E and gamma subunits are structurally similar, despite the fact that their genes do not show significant homology.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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